The killing raised questions at home and abroad about whether Pakistani military and intelligence service were too incompetent to catch the Al Qaeda leader or knew all along where was hiding.

Pakistani authorities set up a commission to look into how bin Laden could have lived for several years undetected at a house a few kilometres from its military academy and how the United States was able to conduct the raid without the military's knowledge.

But Pakistanis are still waiting for the commission's findings.

"It was a shame that Osama was living among us. But the American attack was a bigger shame because our army did not know when foreigners intruded into our country," Nighat Anees, a retired college professor said yesterday.

"But so far we don't know who was responsible for this. No one has been punished so far. I doubt that anyone will be ever punished for this shame."

"Pakistani security establishment would like to forget this event because an investigation would expose either failure or some sort of connivance and it would like to avoid it," Hasan Askari Rizvi, an independent security and political analyst based in Lahore said.

Bin Laden's killing also sparked mistrust between the military and the government of President Asif Ali Zardari and led to speculation that the army might try to topple the civilian leadership. The controversy eased after the army chief, General Ashfaq Kayani, said he had no plans to stage a coup.

Hundreds of militants loyal to Al Qaeda and the Taliban have been killed in a series of military offensives in their strongholds along the Afghan border in recent years but they still manage to stage major attacks across Pakistan.

This month, scores of militants stormed a high-security prison in the town of Bannu and freed more than 350 prisoners, including many dangerous militants, in the largest jailbreak in country's history.